Spinning lathe



July 21, 1964 w. BOS CH 3,141,433

SPINNING LATHE Filed March 12, 1959 4 Sheets-Sheet l WALTER BOSCH iii/dual ATTORNEYS W. BOSCH SPINNING LATHE July 21, 1964 4 Sheets-Sheet 2 Filed March 12, 1959 INVENTOR WA LT ER BOSCH B3 Mud ATTORNEYS July 21, 1964 w, BOSCH 3,141,433

SPINNING LATHE Filed-March 12, 1959 4 Sheets-Sheet s 43 50 44I/NVEN7'0P i WALTER BOSCH BY (mm/a1 ATTO R N EYS W. BOSCH SPINNING LATHE July 21, 1964 4 Sheets-Sheet 4 Filed March 12, 1959 Fig.7

INVENTOR ATTORNEYS United States Patent 3,141,433 SPINNING LAT Waiter Bosch, Nellingen, Kreis Esslingen, Germany,

assignor to Bohner und Kohle Maschinenfahrilk, Esslingen (Neckar), Germany Filed Mar. 12, 1959, Ser. No. 798,938 Claims priority, application Germany Mar. 15, W58 22 Claims. (Cl. 11353) The present invention relates to improvements in spinning lathes, also called flow-forming, flow-stretching, and flow-turning lathes.

In spinning lathes in which a blank is pressed into any desired round shape by a spinning roller, it is already known to use hydraulic force for pressing the spinning roller against the blank. The spinning roller is then mounted in a top or roller slide which is usually guided in a central slide which, in turn, is adjustable on a longitudinal slide which is mounted on the lathe bed and may be swiveled relative thereto. The hydraulic feeding power in these machines is adjusted to a definite strength. The disadvantage of these machines is primarily that it is impossible to control the movement of the spinning roller automatically by means of a tracer-controlled copying or profiling attachment. Although in another known type of spinning lathe the spinning roller is pressed against a master template, this is done by manual force and not by hydraulic power, and consequently only a slight forming pressure can be transmitted to the workpiece.

It is an object of the present invention to provide a spinning lathe of the first-mentioned type which is hydraulically operated and in which the hydraulic transmissions for effecting the movements of the spinning roller are controlled by a tracer-controlled copying or profiling attachment. More specifically, the invention consists in positively connecting the top or roller slide with a tracer slide and in connecting the latter by means of a hydraulic transmission with a tracer which slidably engages with a master template and follows the contours thereof.

Since according to the invention the movement of the spinning roller is controlled hydraulically by a tracer attachment, no physical strength is required for the forming operation. This results in the decided advantage that in many cases it is easily possible to draw or press workpieces even of rather complicated shapes in a single operation or at least in a considerably lower number of operations than were previously required. The present invention also permits the forming pressure of the spinning roller to be determined by a master template so that any desired wall thickness may be attained in the respective workpiece and the spinning operation may be carried out fully automatically.

Although the tracer attachment may be of various designs, it preferably consists either of a swiveling tracer arm with a profiling or copying finger thereon which is adapted to engage with a master template, or of a tracer pin which is movable in all directions and likewise adapted to engage with a master template. Of course, the spinning lathe according to the invention may also be operated without a master template and the forming operation be controlled by hand or by operating against a fixed stop.

Since the pressure required for the spinning operation is often very great and may amount to 20,000 pounds and more, the present invention further provides special means for taking up these pressures, for preventing the top slide from yielding or tilting thereunder, and for clamping the longitudinal slide securely to the lathe bed by means of clamping bolts of a special design and arrangement.

These and further objects, features, and advantages of the present invention will become more apparent from the following detailed description thereof, particularly 3,141,433 Patented July 21, 1964 when read with reference to the accompanying diagrammatic drawings, in which- FIGURE 1 shows a plan view, partly in section, of a part of a spinning lathe according to the invention;

FIGURE 2 shows a cross section of the longitudinal slide taken in the transverse direction thereof and also showing the clamping mechanism;

FIGURE 3 shows a cross section taken along line TIL-III of FIGURE 2;

FIGURE 4 shows a perspective end view of the top slide and the central slide as seen in the direction shown by the arrow IV in FIGURE 1;

FIGURE 5 shows a plan view of a part of a spinning lathe according to a modification of the invention;

FIGURE 6 shows a cross section taken along line VI-VI in FIGURE 5;

FIGURE 7 shows a diagrammatic view of the hydraulic system for operating the spinning machine; while FIGURE 8 shows a modified arrangement of a tracer attachment similar to that as illustrated in FIGURES 5 and 6.

Referring to the drawings, and first particularly to FIG- URES 1 to 4, the spinning lathe according to the invention consists of a lathe frame with the usual headstock 1 upon which the spinning chuck 2 is secured. A blank 3 is pressed by the tail spindle 5 through backstop 4 against the spinning matrix or chuck 2 which is adapted to be rotated and is taken along by the latter by friction. A spinning roller 6 is adapted to press against blank 3 and is mounted within a roller support 7 which is mounted on a top or roller slide 8. The latter is, in turn, mounted in the usual manner on an intermediate or center slide 9 which is mounted on a longitudinal slide 10 which is adapted to be swiveled relative to the bed 67 of the lathe.

The top or roller slide 8 is displaceable in a conventional manner on the center slide 9 in the direction of the axis 35 of the roller support 7. The center slide 9 may be slid along the axis 36 within the longitudinal slide 10. This longitudinal slide 10 is pivotally provided on the slide bed 67 which is disposed laterally of the headstock 1. The axis 36 of the longitudinal slide 10 encloses, with respect to axis 68, an angle a which may be adjusted as desired. In this manner, the longitudinal slide 10 may be pivoted to any position with regard to the headstock 1' or, also, parallel thereto. In FIGURE 1 the angle a is illustrated as approximately 45 so that the spinning roller 6 presses against the blank 3 under that angle. Any conventional means of pivotally mounting the longitudinal slide 10 may be used. A means for clamping the longitudinal slide in its place in order to provide a rigid connection against which the spinning roller 6 may press is illustrated in FIGURES 2 and 3.

As illustrated in FIGURE 1, the top slide 8 is positively connected by a spindle 15 to a tracer slide 18 which is likewise mounted on the center slide 9. The hydraulic force for transmitting the movements of the tracer to the spinning roller 6 is controlled by a slide valve 19 which communicates with a hydraulic cylinder 20, the piston of which is connected to tracer slide 18 which, in turn, is connected through spindle 15 to the topslide 8 carrying the spinning roller 6. This hydraulic mechanism will be later described in detail with reference to FIGURE 7.

The tracer mechanism according to the invention consists of a tracer arm 17 which is preferably pivotably mounted on the tracer slide 18 and has a tracer finger 16 thereon. The slide valve 19 which is secured to tracer slide 18 has a slide rod 55 therein (see FIGURE 7) engaging with its outer end against tracer arm 17, While the tracer finger 15 engages against master template 7 12 which is removably mounted on a template support 11 which is rigidly secured to the longitudinal slide 11 The center slide 9 is movable relative to the longitudinal slide in the usual manner by a spindle 65 or a main spindle, not shown. By the action of slide rod 55 tracer arm 17 will always be pressed against the master template 12 and the movements of slide rod 55 within slide valve 19 in accordance with the curved shape of template 12 will thus be transmitted through cylinder 20 to top slide 8 and thereby through the spinning roller 6 to the workpiece for shaping thereof.

The free end of tracer arm 17 freely engages with a stop member 49 which is adjustable by a spindle 14 which is mounted in the center slide 9. This spindle may be used to carry out the spinning operation by free-shaping without a master template 12 as more fully described hereinafter by proceeding in a series of successive steps as indicated in FIGURE 1 in dotted lines, until the blank 3 has finally attained the desired shape.

In order to permit a suitable adjustment of the top slide 8 and tracer slide 18 relative to each other so that the tracer finger 16 will be in a proper engagement with the master template 12, the tracer slide is connected to spindle which is manually adjustable by a handwheel. The roller slide 8 and the tracer slide 18 are coupled rigidly to each other, in other words, if the tracer slide 18 moves due to the tracing movements of the tracer finger 16 at the template 12, the roller slide 8 will follow this movement. It is necessary, prior to the beginning of the machining operations, to perform a precise alignment between the tracer finger 16 and template 12, between the roller 6 and the blank 3, and between slides 18 and 3. In order to facilitate this alignment, it is advantageous to make the spacing between the tracer slide 18 and the roller slide 8 variable and adjustable and the setting spindle 15 serves this purpose. This arrangement serves to space parts 18 and 8 precisely and adjustably. This alignment is made only once; namely, prior to the beginning of the machining operations. In this manner, the adjustment of the copying pin 16 at the pattern 12 and simultaneously the positioning of the roller 6 at the blank 3 will be facilitated and accelerated.

Summarizing movement of the various slides during operation of the spinning lathe, the longitudinal slide 1% is initially set at the desired angle on in relation to the axis of the spinning lathe or headstock 1'. An angle or is selected which will permit machining of the desired shape in the simplest and most expedient manner. This angle is set prior to the machining operation. Also, prior to the machining operation, the relative positions of the tracer slide 18 and roller slide 8 are adjusted in the desired manner. This adjustment must, as mentioned above, be made with each chuck 2 and template 12 to insure that the tracer finger 16 causes the roller 6 to act against the blank 3 in the desired manner. After setting of angle at and adjusting the tracer slide 18 with respect to the roller slide 8, the center slide 9 is moved relative to longitudinal slide 1% with the tracer finger 16 closely following template 12 to shape the blank 3 in the desired manner. Since the longitudinal slide It is stationary, the template 12 is likewise stationary, and the tracer finger 16 can trace the complete pattern by means of the center slide 9 which slowly moves along the longitudinal slide 10. Since the forward and backward movement of tracer finger 16 also carries tracer arm 17 which presses in turn upon piston rod 55 of the valve 19 which generates movement of the feed piston 20 through the hydraulic system described hereinbelow with reference to FIGURE 7 and the piston 21) is connected with tracer slide 18 and thereby to roller slide 8, movements of the tracer finger 16 are transmitted hydraulically to the roller carriage 8 which carries the shaping roller 6 so that the blank is machined to fit the shape chosen by the spinning chuck 2 and template 12.

The shaping roller 6 can move toward the blank 3 only to the extent permitted by the tracer finger 16, or

rather, the template 12, and this feature is used to control the thickness of the blank 3 in addition to shaping thereof. For example, if the shaping roller 6 moves toward the blank 3, but at a reduction of one-tenth of a millimeter, the blank will be given a correspondingly lesser impression at the chuck 2. This results in the appropriate desired shape as determined by the template 12. If, in addition to the pressing upon part 2, there is still a further movement feasible through the shape of template 17., for example, one-tenth of a millimeter, this additional pressing will effect the general thickness of blank 3. Therefore, by the shape of template 12 in relation to chuck 2, the desired thickness of the blank can be con trolled.

Furthermore, according to the present invention, manual shaping of the blank is possible since the copying pin 16 does not press directly upon piston rod 55. The tracer finger 16 is attached to the pivoting tracer lever 17 which in turn presses against rod 55. This construction is significant since the free end of the tracing lever 17 abuts stop member 49, the position of which can be adjusted along the carriage 9 by spindle 14. If the template 12 is to be used for the machine operations, spindle 14 will be used to manually move member 49 backward to such an extent that the tracing lever 17 can freely pivot. In other words, the tracing lever 17 can transmit movements of the tracing finger 16 Without interference by member 49. The above-described situation exists if the machine operation is performed using the template 12. However, if the operations are to be carried out without the use of a template or pattern 12, for example, step-by-step at manual operation, the tracing lever 17 will abut member 19 and follow the movements of this part. The positioning member 49 on slide 9 is then adjusted manually by spindle 14 and any desired steps can be attained in this manner as indicated by the broken lines in FIGURE 1.

Due to the hydraulic system described hereinbelow, the piston rod 55 always has the tendency to move forward, in other words, it Will always abut the tracing lever 17, and it will always abut member 49 or template 12, respectively. Upon the conclusion of the lathe operation, member 49 and with it tracing lever 17 are moved back by spindle 14 to any position desired and rod 55 is carried therealong.

Obviously, the spinning chuck 2 must be designed taking into consideration the object to be manufactured and the template 12 must possess such curved shape that, in conjunction with the spinning chuck 2, the desired object can be manufactured during the lathe operation. These considerations are obvious in the case of spinning lathes.

FIGURE 7 illustrates diagrammatically a suitable hydraulic system for controlling the operation of a spinning lathe of the type as shown in FIGURE 1. A pump, preferably a gear pump, which is driven by an electric motor, not shown, supplies oil under pressure through the required conduits and a control valve 53 to the hydraulic cylinder 20 to act upon the tracer slide 18. A governor relief valve 52 of a conventional type is connected to the pressure conduit coming from pump 51 to insure the safety of operation of the hydraulic system. The pressure conduit leads from control valve 53 first to slide valve 19 in which a piston 54 is slidable. The outer end of the piston rod 55 of piston 54 serves as a tracer finger which engages with the tracer arm 17 carrying tracer finger 16. At its other side, piston 54 carries another piston rod 57 which projects from slide valve 19 so that the latter may also be operated by hand. A spring 56 maintains the tracer finger 55 in a resilient engagement with the template 12.

If piston 54- shifts in the cylinder of slide valve 19 in one or the other direction due to changing shape of master template 12 and the relative lateral movement between template 12 and tracer finger 55, the pressure may pass through one or the other connecting conduit between slide valve 1? and cylinder 20 and act upon the piston in this cylinder to move the same either forwardly or rearwardly and thereby transmit such movement to the tracer slide 18 which, as shown in FIGURE 1, is positively connected to the top slide 8 carrying the spinning roller 6. Thus, the movements of tracer finger 55 in accordance with the shape of master template 12 effect and control the movements of the top or roller slide 8 and thus of the spinning roller 6 so that the blank 3 will be automatically or semi-automatically formed in compliance with or in a certain proportion to the contour of master template 12 and spinning chuck 2.

For reversing the movement of tracer finger 55 and disengaging it from the master template 12;, an electromagnetically operated valve 58, connected in a conventional switch and circuit arrangement, is connected to a conduit, the two branches of which lead to the pressure conduit in front of control valve 53 and to the cylinder of slide valve 19, respectively.

The rate of feed of the longitudinal slide 9 depends either upon the manual operation of the longitudinal spindle 66, shown in FIGURE 1, or upon the speed of the main spindle, not shown, as conventional in any lathe. However, as indicated in dotted lines in FIGURE 7, the rate of feed of the longitudinal slide 9 may also be controlled in relation to the operation of the tracer mechanism. In such a case, the control valve 53 may be omitted and the pressure conduit is passed from pump 51, the operation or pressure of which is then adjustable, directly to slide valve 19. A branch conduit is then connected to the pressure conduit coming from pump 51 and leads through a control valve 59 to a slide valve 60 which may be opened or closed electromagnetically. This electro-magnetic valve 66 controls the reversible hydraulic motor 61, the speed of which in either direction of rotation is transmitted by a suitable gear to the spindle 66 of longitudinal slide 9 so as to move the latter at the required feeding speed. Control valve 59 is designed and adjusted so as to remain inoperative until the pressure in the pressure conduits exceeds that pressure which is required to control the movement of the piston in the hydraulic cylinder 20. Consequently, the hydraulic system is designed so that always at first the tracer mechanism will be actuated so as to move the top slide 8, whereupon the required movement of the longitudinal slide 9 will follow automatically thereafter.

Although not particularly illustrated, it is evident that not only the movements of the top slide 8 with the spinning roller 6 thereon and those of the longitudinal slide 9 may be controlled hydraulically, but that the movements of the central slide 9, the tail spindle 5, and the different chucking means may also be thus controlled.

It will also be evident that the spinning machine according to the invention may be used for forming round objects of any kind either by flow-forming or stretching, or by flow-turning. Without a master template, the machine may also be used for free-shaping and for spinning cylindrical or conical workpieces. The operation may then be carried out either manually or automatically. In view of the hydraulic transmission, even the manual operation may be carried out without requiring any physical effort.

The modification of the invention as illustrated in FIG- URES 5 and 6 differs from the embodiment according to FIGURES l to 4 primarily by the provision of a tracer mechanism which consists of a tracer pin 46 which, in a manner known per se, is movable in all directions and the principle of which is illustrated in FIGURE 8. This tracer pin 46 is enclosed within a housing 47 which is preferably mounted on the tracer slide 18. Tracer pin 46 is secured to and extends through a ball 62 which is mounted at opposite sides of the tracer pin in spherical sockets 63 so that the tracer pin 46 will thus be movable in all directions. The inner end of the tracer pin carries a ball cup 64 containing a ball 65 through which the pivotal movements of tracer pin 46 are transmltted to the cup-shaped end of piston 54 which is slidable in the axial direction within the housing 47. Thus, piston 54 will be pushed back by ball cup 64 through ball 65 regardless of the direction in which the tracer pin 46 is pivoted. In the modification illustrated by FIGURES 5, 6, and 8, spring 56 maintains the piston 54 in resilient contact with ball 65. Consequently, the tracer pin 46 will always effect the operation of the tracer control mechanism and of the piston in cylinder 20, and thus also of the top slide 8 with spinning roller 6 thereon since the piston 54 is moved back and forth by movement of tracer pin 46 and the spring action of spring 56. Furthermore, if the above-mentioned control of the longitudinal slide 10 is also provided, the tracer pin 46 may also be used to control the feeding movement of that slide.

The precision adjustment of tracer pin 46 may be carried out by means of an adjusting device 48, as shown in FIGURE 6. Since the tracer pin 46 is movable in all directions, it is capable of tracing the contour of the master template 12 regardless of the type of curvature thereof, that is, regardless of whether the template curves outwardly or inwardly or extends parallel vertically or obliquely to the template support 11.

According to the modification of the invention as shown in FIGURES 5 and 6, the master template 12' is removably secured to a template slide 43 which, in turn, is slidable within the template support 11' and adjustable in the longitudinal direction thereof by a setting spindle 45. This spindle 45 and the main setting spindle 15, as shown in FIGURE 1, permit a quick adjustment of the tracer pin 46 and template 12 to the proper position relative to each other. Tracer pin 46 may also be moved into engagement with the tracer stop 49' which is for this purpose provided with an upright projection 56. It is thus possible also with this embodiment of the invention to carry out the spinning operation either by tracing the shape of the template 12 or by doing it manually by adjusting the spindle 14, and no other adjustments or changes will be required in order to switch over from one manner of operation to the other.

Since in the spinning operation very high pressures occur, it is necessary to transmit these pressures properly to the lathe bed 67 to provide special means to accomplish this without danger that the slide mechanism will yield to these forces. For this purpose, the longitudinal slide It) which is adapted to be swiveled through an angle relative to the lathe bed 67 as illustrated in FIGURE 1 and is provided with a special clamping mechanism, as shown in FIGURES 2 and 3, which permits this slide to be rigidly locked in any position of adjustment by means of two pairs of tension bolts 37 which are disposed at equal distances from the swivel axis of slide 16, and the heads 38 of which are mounted in grooves 39 in the lathe bed 67. At the upper end, each bolt 37 has a worm wheel 40 rigidly secured thereto which is adapted to serve as a tightening wheel and for this purpose engages with a worm 41. The Worms 41 engaging each pair of worm wheels 40 are secured to a common shaft 42 which is rotatably mounted in the longitudinal slide 10 and adjustable from the outside.

Since the two corresponding worms and worm wheels on each shaft 42 are threaded in opposite directions to each other, one worm 41 having right-hand threads and the other having left-hand threads, a turn on either shaft 42 in one direction will securely wedge and lock the worms and worm wheels relative to each other, while a turn on shafts 42 in the other direction will quickly unlock them. Thus, the longitudinal slide 10 may be securely and quickly locked or unlocked. This locking mechanism is capable of withstanding and transmitting much greater forces than the usual types of locking devices consisting of one or two tension bolts which extend in the direction of the longitudinal axis of a slide.

In order to take up the high pressure forces of the forming or spinning operation and to prevent the slides from yielding or tilting relative to each other, the usual dovetail connections between the top and center slides will not sufiice and it will be necessary to provide special guiding means. As illustrated in FIGURE 4, the top slide 8 into which the roller support 7 is inserted and securely clamped by a cover plate 21, as Well as the center slide 9 are therefore provided With several guide surfaces, some of which are inclined, while the others are vertically disposed to each other and also partly extend horizontally or perpendicularly. These guide surfaces are arranged in their relation to each other so as safely to take up the high radial and axial forces and prevent the slides from yielding, tilting, or bending relative to each other.

For this purpose, the top slide 8 and the center slide 9 are preferably provided at the side facing toward the tailstock with inclined cooperating guide surfaces 22 which merge at their lower edges into a horizontal guide surface 23. This side of the top slide g is therefore provided with an inclined guide surface of the conventional kind which is covered by a guide plate 24 which is rigidly secured to the center slide 9. One or more gibs 34 may also be inserted between guide surface 22 on the top slide 8 and guide plate 24 to permit an adjustment of the sliding action of the top slide.

At one side of the top slide 8 which preferably faces toward the blank or workpiece 3, the center slide 9 is provided with an upwardly projecting web 27 so as to form guide surfaces 25 and 26 on the two slides which extend at right angles to each other. This web 27 on center slide 9 also has a laterally and upwardly extending projection 2% of a rectangular cross section engaging into a corresponding groove in the side wall of the top slide 8. a

By means of this rectangular projection 28 and the corresponding groove, a horizontal guide surface 2% is formed along the upper side and an opposite lower guide surface 30 along the lower side of projection 28, as well as a vertical inner guide surface 31 and a vertical outer guide surface 32. The latter slidably engages with a guide plate 33 which is secured to the top slide 8. In order to permit the sliding action of top slide 8 also to be adjustable at this side, additional gibs 34 may be provided on guide surfaces 3(1) and 32. Since all of the gibs 34 are disposed at an angle to each other, they may be adjusted so as to insure the sliding movement of top slide 8 to be very smooth and practically without any play.

Thus, by the interengagement of the rectangular projection 28 on the center slide 9 with the top slide 8, and particularly by the horizontal guide surfaces 29 and 30, a vertical tilting of top slide 8 due to the high pressures exerted thereon during the forming operation will be completely prevented. All of the other pressures and moments exerted in any other direction will likewise be taken up by the various guide surfaces as described above.

In order to avoid the twisting and tilting moments occurring during the forming operation between the top slide 8 and the center slide 9, the invention further provides that the horizontal axis 35 of the roller support '7 and the feeding axis 36 of the center slide 9, as indicated in FIGURE 4, are disposed at substantially the same level. Furthermore, either the clamping arrangement according to FIGURES 2 and 3 or the manner of guiding the top slide according to FIGURE 4 may also be provided, for example, between the center slide 9 and the longitudinal slide 10.

Although my invention has been illustrated and described with reference to the preferred embodiments thereof, I wish to have it understood that it is no way limited to the details of such embodiments, but is capable of numerous modifications within the scope of the appended claims.

Having thus fully disclosed my invention, what I claim is:

1. In a spinning lathe having a bed, a headstock with a rotatable spindle therein at one side of said bed, means for mounting a spinning chuck on said spindle, said spinning chuck being adapted to hold and rotate a blank to be formed, a spinning roller adapted to press against said blank, a compound slide for mounting said spinning roller on said lathe bed comprising a top slide, said spinning roller being mounted on said top slide, an intermediate slide carrying said top slide, and a lower longitudinal slide carrying said intermediate slide and mounted on said lathe bed, said lower slide being adapted to be swiveled to different angles relative to said lathe bed, said intermediate slide being slidable on said longitudinal slide, means for moving said slides relative to each other and relative to said spinning chuck and for pressing said spinning roller against said blank, said last-mentioned means including a tracer-controlled profiling mechanism, said mechanism comprising a tracer slide mounted on said intermediate slide, means for positively connecting said tracer slide to said top slide whereby movement of said tracer slide controls movement of said top slide and thereby said spinning roller, means for mounting a master template on said longitudinal slide, a tracer adapted to engage with and move along said master template, and means for movably mounting said tracer, and hydraulic power-transmitting and increasing means, said hydraulic means operatively connecting said tracer and said tracer slide for transmitting the movements of said tracer to said tracer slide and thus also to said top slide and the spinning roller thereon and for transforming the tracer pressure into a high press-on pressure.

2. A spinning lathe as defined in claim 1, in which said tracer comprises a tracer arm pivotably mounted on said tracer slide and a tracer finger secured to said arm and adapted to engage with said master templat and said means for mounting said master template includes means for exchangeably securing said template, and in which said hydraulic power-transmitting and increasing means comprising a hydraulic piston-cylinder unit, the piston of said unit being connected to said tracer slide, a source of hydraulic pressure, and means operatively connecting said source with the cylinder of said unit including a slide valve having a slide member projecting therefrom and engaging with said tracer arm, said slide member controlling the supply of hydraulic pressure to said unit to thereby control transmission of the pressure and movements of said tracer to said tracer slide.

3. A spinning lathe as defined in claim 1, in which said tracer mechanism comprises a housing mounted on said tracer slide, a universally movable tracer pin mounted in said housing and projecting therefrom, said housing further containing control means actuated by said tracer pin for controlling said hydraulic power transmitting and increasing means, a precision tracer-adjustment device mounted on said housing, said tracer pin being adapted to engage with said template, said template mounting means comprising a template support, means for exchangeably securing said template to said support, means for slidably mounting said support on said longitudinal slide, and means for adjusting said support to different positions.

4. A spinning lathe as defined in claim 1, further comprising a stop member adapted to engage with said tracer to limit the movement thereof, and means for adjusting said stop member.

5 A spinning lathe as defined in claim 1, in which said means for positively connecting said tracer slide to said top slide comprise a spindle, and means for rotating said spindle so as to vary the distance between said top and tracer slides.

6. In a spinning lathe having a bed, a headstock with a rotatable spindle mounted thereon at one side of said bed, means for mounting a spinning chuck on said spindle, said spinning chuck being adapted to hold and rotate a blank to be formed, a spinning roller adapted to press against said blank, a compound slide means for mounting said spinning roller on said lathe bed comprising a top slide, said spinning roller being mounted on said top slide, an intermediate slide carrying said top slide, and a lower longitudinal slide carrying said intermediate slide and mounted on said lathe bed and adapted to be swiveled to different angles parallel to said lathe bed, said intermediate slide being slidable on said longitudinal slide, means for clamping said longitudinal slide in various swiveled positions to said lathe bed, said clamping means including at least one pair of clamping bolts, each said bolt being provided with a worm wheel, at least one shaft rotatably mounted in said longitudinal slide, a pair of worms secured to said shaft, each worm being in engagement with one of said worm wheels, and means at one side of said longitudinal slide for turning said shaft for actuating both worms and worm wheels simultaneously, means for moving said slides relative to each other and relative to said spinning chuck and for pressing said spinning roller against said blank, said last-mentioned means including a tracer-controlled profiling mechanism, said mechanism comprising a tracer slide mounted on said intermediate slide, means for positively connecting said tracer slide to said top slide whereby movement of said tracer slide is transferred to said top slide and thereby to said spinning roller, means for mounting a master template on said longitudinal slide, a tracer adapted to engage with and move along said master template, and means for movably mounting said tracer, and hydraulic powertransmitting and increasing means, said hydraulic means operatively connecting said tracer and said tracer slide for transmitting the movements of said tracer to said tracer slide and thus also to said top slide and the spinning roller thereon and for transforming the tracer pressure into a high press-on pressure.

7. A spinning lathe as defined in claim 6, in which one of the two worms mounted on said shaft and its interengaging worm wheel have right-hand threads and the other worm and its interengaging worm wheel have lef hand threads.

8. A spinning lathe as defined in claim 7, wherein said clamping means further includes nuts mounted in recesses in said lathe bed, tension bolts screwed into said nuts, said worm wheels being secured to said bolts, and wherein two pairs of each of said nuts, tension bolts, worms and worm wheels are provided so as to form four sets, said sets being disposed in a radial arrangement around the swivel axis of said longitudinal slide and at substantially equal distances from each other, and a pair of shafts each having one pair of said worms with right and left-hand threads, respectively, secured thereto, said worm Wheels interengaging with said worms having corresponding threads, said two shafts being rotatably mounted in said longitudinal slide substantially parallel to each other, said means for turning each of said shafts being disposed at the same side of said longitudinal slide.

9. A spinning lathe as defined in claim 1, further comprising a stop member adapted to engage with said tracer slide to limit the movement thereof, and means for adjusting said stop member.

10. In a spinning lathe having a bed, a head stock with a rotatable spindle mounted thereon at one side of said bed, means for mounting a spinning chuck on said spindle, said spinning chuck being adapted to hold and rotate a blank to be formed, a spinning roller adapted to press against said blank, a compound slide means for mounting said spinning roller on said lathe bed comprising a top slide, said spinning roller being mounted on said top slide, an intermediate slide carrying said top slide, and a lower longitudinal slide carrying said intermediate slide, said intermediate slide and said top slide being provided at one side with a plurality of cooperating guide surfaces extending at right angles to each other, said guide surfaces being formed at least in part by an upwardly projecting web provided on said intermediate slide and having a guiding projection thereon extending toward said top slide and into a guide groove formed in said top slide, said projection having a horizontal guide surface at the lower side thereof and an adjoining inner guide surface extending vertically thereto, said lower longitudinal slide being mounted on said lathe bed and adapted to be swiveled to different angles parallel to said lathe bed, said intermediate slide being slidable on said longitudinal slide, means for moving said slides relative to each other and relative to said spinning chuck and for pressing said spinning roller against said blank, said last-mentioned means including a tracer-controlled profiling mechanism, said mechanism comprising a tracer slide mounted on said intermediate slide, means for positively connecting said tracer slide to said top slide Whereby movement of said tracer slide is transferred to said top slide and thereby to said spinning roller, means for mounting a master template on said longitudinal slide, a tracer adapted to engage with and move along said master template, and means for movably mounting said tracer, and hydraulic power-transmitting and increasing means, said hydraulic means operatively connecting said tracer and said tracer slide for transmitting the movements of said tracer to said tracer slide and thus also to said top slide and the spinning roller thereon and including means for transforming the tracer pressure into a high press-on pressure.

11. A spinning lathe as defined in claim 10, wherein said compound slide means further includes a supporting member removably mounted in said top slide, the longitudinal axis of said supporting member and the axis of movement of said intermediate slide being disposed at substantially the same level, said spinning roller being mounted directly on said supporting member.

12. In a spinning lathe having a bed, a headstock with a rotatable spindle therein at one side of said bed, means for mounting a spinning chuck on said spindle, said spin ning chuck being adapted to hold and rotate a blank to be formed, a spinning roller adapted to press against said blank, compound slide means for mounting said spinning roller on said lathe bed comprising a top slide, said spinning roller being mounted on said top slide, an intermediate slide carrying said top slide, and a lower longitudinal slide carrying said intermediate slide and mounted on said lathe bed and adapted to be swiveled to different angles parallel to said lathe bed, said intermediate slide being slidable on said longitudinal slide, means for pressing said spinning roller against said blank including means for moving said slides relative to each other and relative to said spinning chuck and a tracer-controlled profiling mechanism for controlling said moving means, said moving means including a tracer slide mounted on said intermediate slide and means for positively connecting said tracer slide to said top slide, said tracer mechanism comprising a master template, tracer means adapted to engage with and move along said master template, said tracer means including a tracer arm pivotally mounted on said tracer slide and a tracer finger secured to said tracer arm and adapted to engage with said master template, and hydraulic power-transmitting and increasing means, said hydraulic means operatively connecting said tracer means and said tracer slide for transmitting the movements of said tracer means along said template to said tracer slide and thus also to said top slide and the spinning roller thereon and for transforming the tracer pressure into a high press-on pressure, said hydraulic power-transmitting and increasing means comprising a source of pressure fluid, a cylinder having a piston movable therein, said piston being connected to said tracer slide to control movement thereof, means for supplying pressure fluid from said source to said cylinder on both sides of said piston to control movement of said piston including slide valve means for selectively applying the force of said fluid on opposite faces of said piston to control the movement thereof, said slide valve including a slide member connected to said tracer means so that movement of said tracer means controls movement of said slide member en arges i i and thereby operation of said slide valve and thereby movement of said top slide.

13. A spinning lathe as defined in claim 12, wherein said hydraulic power-transmitting and increasing means further includes means for moving said longitudinal slide relative to said spinning chuck comprising a reversible hydraulic motor and conduit means for supplying pressure fluid from said source to said motor including valve means for preventing supply of pressure fluid to said motor until sutlicient pressure fluid has been supplied to said piston to control movement thereof.

14. In a spinning lathe having a bed, a headstock with a rotatable spindle mounted thereon at one side of said bed, means for mounting a spinning chuck on said spindle, said spinning chuck being adapted to hold and rotate a blank to be formed, a spinning roller adapted to press against said blank, a compound slide for mounting said spinning roller on said lathe bed comprising a top slide, said spinning roller being mounted on said top slide, an intermediate slide carrying said top slide, and a lower longitudinal slide carrying said intermediate slide, said intermediate slide and said top slide each being provided at one side with a plurality of cooperating guide surfaces extending at right angles to each other, said guiding surfaces being formed in part by an upwardly projecting web on said intermediate slide having a guiding projection thereon extending toward said top slide and into a guide groove formed in said top slide, said projection having a horizontal guide surface at the lower side thereof and an adjoining inner guide surface extending vertically thereto, the upper part of said guiding projection having a finger thereon forming an outer guide surface extending vertically between said inner guide surface and the main body of said intermediate slide, a cover plate for said vertical outer guide surface, said lower longitudinal slide being mounted on said lathe bed and adapted to be svviveled to different angles parallel to said lathe bed, said intermediate slide being slidable on said longitudinal slide, means for moving said slides relative to each other and relative to said spinning chuck and for pressing said spinning roller against said blank, said last-mentioned means including a tracer-controlled profiling mechanism, said mechanism comprising a tracer slide mounted on said intermediate slide, means for positively connecting said tracer slide to said top slide whereby movement of said tracer slide is transferred to said top slide and thereby to said spinning roller, means for mounting a master template on said longitudinal slide, and tracer means adapted to engage with and move along said master template, said tracer means including a tracer arm pivotally mounted on said tracer slide and a tracer finger secured to said tracer arm and adapted to engage with said master template, and hydraulic power-transmitting and increasing means, said hydraulic means operatively connecting said tracer means and said tracer slide for transmitting the movements of said tracer means to said tracer slide and thus also to said top slide and the spinning roller thereon and for transforming the tracer pressure into a high press-on pressure, said hydraulic power-transmitting and increasing means comprising a source of pressure fluid, a cylinder having a piston movable therein, said piston being connected to said tracer slide to control movement thereof, means for supplying pressure fluid to said cylinder to control movement of said piston including a slide valve for selectively controlling the application of said pressure fluid to the opposite faces of said piston to control movement of said piston, said tracer means being secured, to said slide valve whereby movement of said tracer means controls operation of said slide valve and thereby movement of said top slide and pressing of said spinning roller against said blank.

15. In a spinning lathe having a bed, a headstock with a rotatable spindle mounted thereon at one side of said bed, means for mounting a spinning chuck on said spindle, said spinning chuck being adapted to hold and rotate a blank to be formed, a spinning roller adapted to press against said blank, a compound slide for mounting said spinning roller on said lathe bed comprising a top slide, said spinning roller being mounted on said top slide, an intermediate slide carrying said top slide, and a lower longitudinal slide carrying said intermediate slide and mounted on said lathe bed and adapted to be swiveled to different angles parallel to said lathe bed, said intermediate slide being slidable on said longitudinal slide, means for clamping said longitudinal slide in various swiveled positions to said lathe bed, said clamping means including at least one pair of clamping bolts, each bolt being provided with a worm wheel adapted to serve as a clamping wheel, at least one shaft rotatably mounted in said longitudinal slide, a pair of worms secured to said shaft, each worm being in engagement with one of said worm wheels, and means at one side of said longitudinal slide for turning said shaft for actuating both worms and Worm wheels simultaneously to securely wedge said worms and worm wheels relative to each other, means for moving said slides relative to each other and relative to said spinning chuck and for pressing said spinning roller against said blank, said last-mentioned means including a tracer-controlled profiling mechanism, said mechanism comprising a tracer slide mounted on said intermediate slide, means for positively connecting said tracer slide to said top slide whereby movement of said tracer slide is transferred to said top slide and thereby to said spinning roller, means for mounting a master template on said longitudinal slide, and tracer means adapted to engage with and move along said master template, said tracer means including a tracer arm pivotally mounted on said tracer slide and a tracer finger secured to said tracer arm and adapted to engage with said master template, and hydraulic power-transmitting and increasing means, said hydraulic means operatively connecting said tracer means and said tracer slide for transmitting the movements of said tracer means to said tracer slide and thus also to said top slide and the spinning roller thereon and for transforming the tracer pressure into a high press-on pressure, said hydraulic power-transmitting and increasing means comprising a source of pressure fluid, a cylinder having a piston movable therein, said piston being connected to said tracer slide to control movement thereof, means for supplying pressure fluid to said cylinder to control movement of said piston including a slide valve means for selectively controlling the application of said pressure fluid to the opposite piston faces of said piston to control movement of said piston, said tracer means be ing secured to said slide valve whereby movement of said tracer means controls operation of said slide valve and thereby movement of said top slide.

16. In a spinning lathe having a bed, a headstock with a rotatable spindle mounted thereon at one side of said bed, means for mounting a spinning chuck on said spindle, said spinning chuck being adapted to hold and rotate a blank to be formed, a spinning roller adapted to press against said blank, a compound slide for mounting said spinning roller on said lathe bed comprising a top slide, said spinning roller being mounted on said top slide, an intermediate slide carrying said top slide, and a lower longitudinal slide carrying said intermediate slide, said intermediate slide and said top slide being provided at one side with a plurality of cooperating guide surfaces extending at right angles to each other, said guiding surfaces being formed in part by an upwardly projecting web on said intermediate slide having a guiding projection thereon extending toward said top slide and into a guide groove formed in said top slide, said projection having a horizontal guide surface at the lower side thereof and an adjoining inner guide surface extending vertically thereto, the upper part of said guiding projection having a finger thereon to form an outer guide surface extending vertically between said inner guide surface and the main body of said intermediate slide, a cover plate for said vertical outer guide surface, said lower longitudinal slide being mounted on said lathe bed and adapted to be swiveled to different angles parallel to said lathe bed, said intermediate slide being slidable on said longitudinal slide, means for clamping said longitudinal slide in various swiveled positions to said lathe bed, said clamping means including at least one pair of clamping bolts, each said bolt being provided with a worm wheel adapted to serve as a clamping wheel, at least one shaft rotatably mounted in said longitudinal slide, a pair of worms secured to said shaft, each worm being in engagement with one of said worm wheels, and means at one side of said longitudinal slide for turning said shaft for actuating both worms and worm wheels simultaneously to securely wedge said worms and worm wheels relative to each other, means for moving said slides relative to each other and relative to said spinning chuck and for pressing said spinning roller against said blank, said last-mentioned means including a tracer-controlled profiling mechanism, said mechanism comprising a tracer slide mounted on said intermediate slide, means for positively connecting said tracer slide to said top slide whereby movement of said tracer slide is transferred to said top slide and thereby to said spinning roller, means for mounting a master template on said longitudinal slide, and tracer means adapted to engage with and move along said master template, said tracer means including a tracer arm pivotally mounted on said tracer slide and a tracer finger secured to said tracer arm and adapted to engage with said master template, and hydraulic power-transmitting and increasing means, said hydraulic means operatively interconnecting said tracer means and said tracer slide for transmitting the movements of said tracer means to said tracer slide and thus also to said top slide and the spinning roller thereon and for transforming the tracer pressure into a high press-on pressure, said hydraulic power-transmitting and increasing means comprising a source of pressure fluid, a cylinder having a piston movable therein, said piston being connected to said tracer slide to control movement thereof, means for supplying pressure fluid to said cylinder to control movement of said piston including a slide valve for selectively controlling the application of said pressure fluid to the opposite faces of said piston to control movement of said piston, said tracer means being secured to said slide valve whereby movement of said tracer means controls operation of said slide valve and thereby movement of said top slide.

17. A spinning lathe as defined in claim 16, wherein said hydraulic power-transmitting and increasing means further includes means for moving said longitudinal slide relative to said spinning chuck comprising a reversible hydraulic motor and conduit means for supplying pressure fluid from said source to said motor including valve means for preventing supply of pressure fluid to said motor until sufficient pressure fluid has been supplied to said piston to control movement thereof.

18. In a spinning lathe having a bed, in combination, spaced slide members mounted on the lathe bed for supporting and guiding the spinning roller including a top slide having said spinning roller mounted thereon, an intermediate slide carrying said top slide, and a lower longitudinal slide carrying said intermediate slide, said intermediate slide and said top slide being provided each at one side with a plurality of cooperating guide surfaces extending at right angles to each other, said guiding surfaces being formed in part by an upwardly projecting web on said intermediate slide having a guiding projection thereon extending toward said top slide and into a guide groove formed in said top slide, said projection having a horizontal guide surface at the lower side thereof and an adjoining inner guide surface extending vertically thereto, the upper part of said guiding projection having -a finger thereon to form an outer guide surface extending vertically between said inner guide surface and the 14 main body of said intermediate slide, and a cover plate for said vertical outer guide surface, said intermediate slide being slidable on said longitudinal slide, and means for moving said slides relative to each other.

19. In a machine tool having a bed, in combination, spaced slide members mounted on said bed for supporting and guiding a translatable machine part including a top slide having said translatable machine part mounted thereon, an intermediate slide carrying said top slide, and a lower longitudinal slide carrying said intermediate slide, said intermediate slide and said top slide being provided at one side with a plurality of cooperating guide surfaces extending at right angles to each other, said guiding surfaces being formed at least in part by an upwardly projecting web on said intermediate slide having a guiding projection thereon extending toward said top slide and into a guide groove formed in said top slide, said projection having a horizontal guide surface at the lower slide thereof and an adjoining inner guide surface extending vertically thereto, the upper part of said guiding projection having a finger thereon forming an outer guide surface extending vertically between said inner guide surface and the main body of said intermediate slide, a cover plate for said vertical outer guide surface, said lower longitudinal slide being mounted on said machine tool bed and adapted to be swiveled to different angles parallel to said bed, said intermediate slide being slidable on said longitudinal slide, and means for moving said slides relative to each other.

20. A machine tool as defined in claim 19, further comprising means for clamping said longitudinal slide in various swiveled positions to said bed, said clamping means comprising at least one pair of nuts mounted in recess in said bed, at least one pair of tension bolts, each screwed into one of said nuts, at least one pair of Worm wheels adapted to serve as clamping wheels, each of said worm wheels being secured to a respective one of said tension bolts, at least one shaft rotatably mounted in said longitudinal slide and a pair of worms secured to said shaft, each Worm being in engagement with one of said worm wheels, and means at one side of said longitudinal slide for turning said shaft for actuating both worms and worm Wheels simultaneously to securely wedge said worms and worm wheels relative to each other.

21. In a spinning lathe having a bed, in combination, spaced slide members mounted on the lathe bed for supporting and guiding a spinning roller including a top slide having said spinning roller mounted thereon, an intermediate slide carrying said top slide, and a lower slide carrying said intermediate slide and mounted on said lathe and adapted to be swiveled to different angles parallel to said lathe bed, said intermediate slide being slidable on said longitudinal slide, means for moving said slides relative to each other, and means for clamping said longitudinal slide in various swiveled positions to said lathe bed, said clamping means comprising at least one pair of nuts mounted in recesses in said lathe bed, at least one pair of tension bolts, each screwed into one of said nuts, at least one pair of worm wheels adapted to serve as clamping wheels, each of said wheels being secured to a respective one of said tension bolts, at least one shaft rotatably mounted in said longitudinal slide and a pair of worms secured to said shaft and each in engagement with one of said worm wheels, and means at one side of said longitudinal slide for turning said shaft for actuating both worms and worm wheels simultaneously to securely wedge said worms and said worm Wheels relative to each other.

22. In a machine tool having a bed, in combination, spaced slide members mounted on said bed for supporting and guiding a translatable machine part including a top slide having said translatable machine part mounted thereon, an intermediate slide carrying said top slide, and a 15 lower longitudinal slide carrying said intermediate slide and mounted on said bed and adapted to be swiveled to diflferent angles parallel to said bed, said intermediatd slide being slidable on saidlongitudinal slide, means for moving said slides relative'to each other, and means for clamping said longitudinal slide in various swiveled positions to said bed, said clamping means including at least one pair of clamping bolts, each said bolt being provided with a worm wheel adapted to serve as a clamping wheel, at least one shaft rotatably mounted in said longitudinal slide, a pair of Worms secured to said shaft, each worm being in engagement with one of said Worm wheels, and means at one side of said longitudinal slide for turning said shaft for actuating both Worms and worm Wheels simultaneously to securely wedge said worms and worm wheels relative to each other.

ReferencesCited'in the file of this patent UNITED STATES PATENTS Cannon Feb. 3, Griffin Sept. 16, Cushwa Feb. 2, Dewey et al. Jan. 18, Shaw Dec. 16, Rutz Mar. 3, Von Selewsky July 21, Siekmann et al. May 18, Chillson Jan. 17, Ernst July 17, Homier Apr. 14, Hirronen Apr. 21, Roberts Sept. 8, Hoffman et a1 Mar. 21, 

1. IN A SPINNING LATHE HAVING A BED, A HEADSTOCK WITH A ROTATABLE SPINDLE THEREIN AT ONE SIDE OF SAID BED, MEANS FOR MOUNTING A SPINNING CHUCK ON SAID SPINDLE, SAID SPINNING CHUCK BEING ADAPTED TO HOLD AND ROTATE A BLANK TO BE FORMED, A SPINNING ROLLER ADAPTED TO PRESS AGAINST SAID BLANK, A COMPOUND SLIDE FOR MOUNTING SAID SPINNING ROLLER ON SAID LATHE BED COMPRISING A TOP SLIDE, SAID SPINNING ROLLER BEING MOUNTED ON SAID TOP SLIDE, AN INTERMEDIATE SLIDE CARRYING SAID TOP SLIDE, AND A LOWER LONGITUDINAL SLIDE CARRYING SAID INTERMEDIATE SLIDE AND MOUNTED ON SAID LATHE BED, SAID LOWER SLIDE BEING ADAPTED TO BE SWIVELED TO DIFFERENT ANGLES RELATIVE TO SAID LATHE BED, SAID INTERMEDIATE SLIDE BEING SLIDABLE ON SAID LONGITUDINAL SLIDE, MEANS FOR MOVING SAID SLIDES RELATIVE TO EACH OTHER AND RELATIVE TO SAID SPINNING CHUCK AND FOR PRESSING SAID SPINNING ROLLER AGAINST SAID BLANK, SAID LAST-MENTIONED MEANS INCLUDING A TRACER-CONTROLLED PROFILING MECHANISM, SAID MECHANISM COMPRISING A TRACER SLIDE MOUNTED ON SAID INTERMEDIATE SLIDE, MEANS FOR POSITIVELY CONNECTING SAID TRACER SLIDE TO SAID TOP SLIDE WHEREBY MOVEMENT OF SAID TRACER SLIDE CONTROLS MOVEMENT OF SAID TOP SLIDE AND THEREBY SAID SPINNING ROLLER, MEANS FOR MOUNTING A MASTER TEMPLATE ON SAID LONGITUDINAL SLIDE, A TRACER ADAPTED TO ENGAGE WITH AND MOVE ALONG SAID MASTER TEMPLATE, AND MEANS FOR MOVABLY MOUNTING SAID TRACER, AND HYDRAULIC 